Zugmeyer, C. A. and J. L. Koprowski. 2007. Avian nestling predation by endangered Mt. Graham red squirrel. The Southwestern Naturalist 52(1): 155-157.

thackerk1 — Tue, 30 Jul 2019 22:19:02 +0000

Authors

Claire A. Zugmeyer

John L. Koprowski

Studies using artificial nests or remote cameras have documented avian predation by red squirrels (Tamiasciurus hudsonicus). Although several direct observations of avian predation events are known in the northern range of the red squirrel distribution, no accounts have been reported in the southern portion. We observed predation upon a hermit thrush (Catharus guttatus) nestling by the Mount Graham red squirrel (T. h. grahamensis), an endangered subspecies living at the southern terminus of the distribution of the red squirrel.

Additional Information

AVIAN NESTLING PREDATION BY ENDANGERED MOUNT GRAHAM RED SQUIRREL

Date of publication:

2007

Topics

red squirrels

predation

hermit thrust

Mount Graham Red Squirrel

artificial nests

Doumas, S. L., J. L. Koprowski, and W. O. Noble. 2016. Landscape-level assessment of Abert's squirrel and red squirrel in mixed conifer forest. The Southwestern Naturalist 60:240-246.

thackerk1 — Tue, 25 Jun 2019 00:36:36 +0000

Authors

Sandra L. Doumas

John L. Koprowski

William O. Noble

We examined feeding sign of Abert’s squirrels (Sciurus aberti) and red squirrels (Tamiasciurus hudsonicus) each spring 2005–2009 in mixed conifer forests in northern Arizona, USA. We used high- resolution aerial photographs to assess vegetation characteristics where feeding sign surveys were conducted and analyzed the association of feeding sign frequency to vegetation characteristics to compare and contrast species habitat use. At the landscape level, we found considerable overlap in characteristics of forests used by the two species of native tree squirrels. Red squirrels used denser forests with fewer and smaller gaps than do Abert’s squirrels, and Abert’s squirrels used more ponderosa pine (Pinus ponderosa) than do red squirrels.

Additional Information

Landscape-level assessment of Abert's Squirrel and Red Squirrel in Mixed Conifer Forest

Date of publication:

2015

Topics

Abert’s squirrels

red squirrels

feeding signs

mixed conifer forests

habitat use

conservation.arizona.edu - red squirrels

Zugmeyer, C. A. and J. L. Koprowski. 2007. Avian nestling predation by endangered Mt. Graham red squirrel. The Southwestern Naturalist 52(1): 155-157.

Authors

Additional Information

Topics

Doumas, S. L., J. L. Koprowski, and W. O. Noble. 2016. Landscape-level assessment of Abert's squirrel and red squirrel in mixed conifer forest. The Southwestern Naturalist 60:240-246.

Authors

Additional Information

Topics